Its a documentary, reality style, but not the fully fabricated type, such as Made in Chelsea, The Only Way is Essex etc.
Having looked into it a bit more, its not mentioned in the documentary, but the company is called Save Britain Money. It actually came second in this year's Sunday Times Best Companies to work for, so thats pretty impressive.
The only caveat I'd add is that remember its a documentary, so true reality is always going to be skewed. Nev is probably a lot like that, but he is bound to play up to the cameras even more so. For example, maybe he doesn't usually drag a single employee around the office setting up dates for a camera crew.
It makes sense though.
It must be pretty soul destroying making cold calls all day and being abused, but with 700 staff, mostly of a young age, having active motivation and rewards is bound to make a better work environment.